Compare AI tools
Side-by-side: what they do, what they cost, what Kai actually thinks. Pass up to 4 tools via ?tools=claude,chatgpt,gemini.
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Coding
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NotebookLM S | Grok A | Claude Code S | HeyGen S | |
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| Tagline | Google's research notebook. Turns your docs into a podcast. | xAI's chatbot. Real-time X/Twitter data + fewer refusals. | Anthropic's CLI agent. Opus-powered, operates on your repo directly. | AI avatar videos. Record once, speak any language. |
| Category | Research | Chatbots | Coding | Video |
| Pricing | Free | Free + $30/mo SuperGrok + included with X Premium | Part of Claude Pro/Max/Team plans | Free + $24-$65/mo |
| Best for | Students, researchers, anyone with a stack of PDFs or a topic to learn. | Breaking news, live event tracking, users already on X. | Developers who want an agent, not autocomplete. Large refactors, tests, docs. | Course creators, multilingual marketers, anyone scaling video content. |
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| Kai's verdict | S-tier for study. The Audio Overview is a killer feature. Try it with three of your favorite PDFs. | A-tier for real-time. B-tier for everything else. Worth checking when news breaks. | S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement. | S-tier for multilingual video. If you sell courses or speak at events, this is a cheat code. |
| Link | Open → | Open → | Open → | Open → |